A self-venting, anti-bubble, automatic fluid checking, precision filtration, infusion apparatus, the drip chamber (3) thereof being provided with a self-venting device the self-venting device comprises a self-venting tube (5) and an air filtration membrane (4) the lower end of the self-venting tube (5) is fixed at the bottom of the drip chamber (3), and is provided with a venting through hole (6) therein for interconnecting the inner cavity of the drip chamber (3) with the external air the air filtration membrane (4) is fixed at the top of the self-venting tube (5) an anti-bubble device is disposed inside the bottom of the drip chamber the anti-bubble device is a hollow venting core (9) a liquid inlet groove (8) is provided on the side wall of the venting core (9) the inner cavity of the venting core (9) communicates with a liquid outlet tube (10) at the lower end of the drip chamber (3) the venting core (9), the bottom end of the drip chamber (3), and the liquid outlet tube (10) at the bottom end of the drip chamber (3) employ an integrated structure a fluid checking device (7) is disposed above the venting core (9). The present invention can be used without inverting or squeezing the drip chamber (3) or closing a flow regulator (11), thus being convenient to operate the air filtration membrane (4) and the venting through hole (6) can successfully vent air in the drip chamber (3), and the venting core (9) and liquid outlet of the drip chamber (3) and the liquid inlet groove (8) of the venting core (9) prevent generation and accumulation of bubbles, and vent the air in the gas-liquid mixture entering the drip chamber (3).Linvention concerne un appareil de perfusion à mise à lair libre automatique, anti-bulle, à contrôle automatique de fluide, avec filtration de précision, dont la chambre compte-gouttes (3) est pourvue dun dispositif de mise à lair libre automatique le dispositif de mise à lair libre automatique comprend un tube de mise à lair libre automatique (5)
